Why don't you try the new Corsair AX850 PSU? GTX460's are fun little fellows but get a 1GB version. Preferably a MSI Cyclone.
http://www.newegg.com/Product/Produc...82E16817139015
http://www.newegg.com/Product/Produc...82E16814127510
I would leave the 1366 platform alone because you sound like me, been there done that. I'm looking into a 1156 platform right now. I would love to do a 6 core AMD setup but Crossfire only. :(